ssp.c

/*
# _____     ___ ____     ___ ____
#  ____|   |    ____|   |        | |____|
# |     ___|   |____ ___|    ____| |    \    PS2DEV Open Source Project.
#-----------------------------------------------------------------------
# Copyright ps2dev - http://www.ps2dev.org
# Licenced under Academic Free License version 2.0
# Review ps2sdk README & LICENSE files for further details.
*/
 
#include "libsnd2_internal.h"
 
int SsSeqSkip(s16 sep_no, s16 seq_no, char unit, s16 count)
{
    int m_unk54;
    int v5;
    libsnd2_sequence_struct_t *score_struct;
    void (*noteon)(s16, s16, u8, u8);
    u8 *m_unk04;
    int m_unk84;
    u8 *v19;
 
    m_unk54 = 0;
    v5 = 0;
    score_struct = &_ss_score[sep_no][seq_no];
    if ( count < 0 )
        return -1;
    if ( !count )
        return 0;
    noteon = SsFCALL.noteon;
    m_unk04 = score_struct->m_unk04;
    _snd_ev_flag = 1;
    score_struct->m_seq_ptr = m_unk04;
    SsFCALL.noteon = dmy_nothing1;
    switch ( unit )
    {
        case SSSKIP_TICK:
            m_unk54 = score_struct->m_unk54 * count;
            break;
        case SSSKIP_NOTE4:
            m_unk54 = count * 10 * score_struct->m_resolution_of_quarter_note;
            break;
        case SSSKIP_NOTE8:
            m_unk54 = count * 5 * score_struct->m_resolution_of_quarter_note;
            break;
        case SSSKIP_BAR:
        {
            int m_rhythm_d;
 
            m_rhythm_d = score_struct->m_rhythm_d;
            if ( m_rhythm_d == 2 )
            {
                m_unk54 = score_struct->m_rhythm_n * count * 10 * score_struct->m_resolution_of_quarter_note;
            }
            else
            {
                int v15;
 
                v15 = count * 10 * score_struct->m_resolution_of_quarter_note;
                if ( (1 << m_rhythm_d) == 0 )
                    __builtin_trap();
                if ( 1 << m_rhythm_d == -1 && (unsigned int)v15 == 0x80000000 )
                    __builtin_trap();
                m_unk54 = v15 / (1 << m_rhythm_d) * score_struct->m_rhythm_n;
            }
            break;
        }
        default:
            break;
    }
    do
    {
        do
        {
            if ( _SsGetSeqData(sep_no, seq_no) == 1 )
            {
                m_unk54 = score_struct->m_unk54;
                m_unk84 = score_struct->m_unk84;
                v19 = score_struct->m_unk04;
                v5 = -1;
                score_struct->m_unk10 = 0;
                score_struct->m_delta_value = m_unk84;
                score_struct->m_seq_ptr = v19;
                score_struct->m_unk0C = v19;
                break;
            }
        } while ( !score_struct->m_delta_value );
        m_unk54 -= score_struct->m_delta_value;
    } while ( score_struct->m_unk54 < m_unk54 );
    SsFCALL.noteon = noteon;
    _snd_ev_flag = 0;
    return v5;
}